And speaking of challenges, it's time for the Immunity Challenge. The teams will split into pairs. Each pair has to run across a teeter-totter and complete a puzzle, which will give them a key. Once all three keys have been retrieved, one final team member will use the keys to unlock a box and raise a flag. Jonas is sitting out for the men.

The first two pairs out are Alicia and Chelsea (so they obviously calmed her down about working with Kat) and Tarzan and Colton. They have to do a puzzle that involves arranging logs of differing lengths so that they form a solid rectangle. Colton and Tarzan finish it off quickly, then remember to grab their key and go back.

Jay and Michael head to the second puzzle, where four pieces need to form a pyramid. Tarzan yells to them "Three corner base" while Colton rolls their eyes. Meanwhile, Probst is haranguing the women about taking such a long time with the easiest puzzle. And the men finish puzzle number two.

Troy and Bill head out to do the third puzzle. The other women tell the women to go check out the men's finished puzzle to see if they can figure it out. They go take a look while the men yell "Cheater" at them. Well, it's mostly Tarzan yelling. Even with the "cheating" (it's totally not cheating because Probst saw them do it and didn't say anything, and while it may be ethically unclear, it's not against the letter of the law), the women still struggle but do finally finish their puzzle and run back. Also, when you're winning by a lot, it's really poor form to harass the people who are losing, TARZAN.

The third puzzle is one of those sliding puzzle where you have to slide tiles around to form an image. Sabrina and Kim are working on the second puzzle, and Probst even says that they have a model to look at, but when they do look over at the men's completed puzzle, Tarzan starts yelling about them being cheaters again. And then Bill and Troy complete the third puzzle and run back with the third key.